w3resource

C++ Exercises: Find LCM of any two numbers using HCF

C++ For Loop: Exercise-29 with Solution

Write a program in C++ to find LCM of any two numbers using HCF.

Pictorial Presentation:

C++ Exercises: Find LCM of any two numbers using HCF

Sample Solution:-

C++ Code :

#include <iostream>
using namespace std;

int main()
{
    int i, n1, n2, j, hcf = 1, lcm;
    cout << "\n\n LCM of two numbers:\n";
    cout << "------------------------\n";
    cout << " Input 1st number for LCM: ";
    cin >> n1;
    cout << " Input 2nd number for LCM: ";
    cin >> n2;
    j = (n1 < n2) ? n1 : n2;
    for (i = 1; i <= j; i++) {

        if (n1 % i == 0 && n2 % i == 0) {
            hcf = i;
        }
    }
    /* mltiplication of HCF and LCM = the multiplication of these two numbers.*/
    lcm = (n1 * n2) / hcf;
    cout << " The LCM of " << n1 << " and " << n2 << " is: " << lcm << endl;
}

Sample Output:

 LCM of two numbers:                                                   
------------------------                                               
 Input 1st number for LCM: 15                                          
 Input 2nd number for LCM: 25                                          
 The LCM of 15 and 25 is: 75

Flowchart:

Flowchart: Find LCM of any two numbers using HCF

C++ Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in C++ to find the number and sum of all integer between 100 and 200 which are divisible by 9.
Next: Write a program in C++ to display the number in reverse order.

What is the difficulty level of this exercise?



Share this Tutorial / Exercise on : Facebook and Twitter

C++ Programming: Tips of the Day

What is a smart pointer and when should I use one?

This answer is rather old, and so describes what was 'good' at the time, which was smart pointers provided by the Boost library. Since C++11, the standard library has provided sufficient smart pointers types, and so you should favour the use of std::unique_ptr, std::shared_ptr and std::weak_ptr.

There was also std::auto_ptr. It was very much like a scoped pointer, except that it also had the "special" dangerous ability to be copied - which also unexpectedly transfers ownership.

It was deprecated in C++11 and removed in C++17, so you shouldn't use it.

std::auto_ptr<MyObject> p1 (new MyObject());
std::auto_ptr<MyObject> p2 = p1; // Copy and transfer ownership. 
                                 // p1 gets set to empty!
p2->DoSomething(); // Works.
p1->DoSomething(); // Oh oh. Hopefully raises some NULL pointer exception.

Ref : https://bit.ly/3mc9GHE